СИСТЕМА ECD (для моделей без контроллера свечей накаливания), Diagnostic DTC:P0340, P0344

DTC Code	DTC Name
P0340	Camshaft Position Sensor "A" Circuit (Bank 1 or Single Sensor)
P0344	Camshaft Position Sensor "A" Circuit Intermittent (Bank 1 or Single Sensor)

DESCRIPTION

The camshaft position sensor is installed on the cylinder head cover. The camshaft has a timing rotor for the camshaft position sensor. When the camshaft rotates, the tooth on the camshaft passes the camshaft position sensor. The generated voltage in the sensor acts as a signal. The ECM locates each cylinder position based on the combination of this signal and crankshaft position sensor signal.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Memory
P0340	Camshaft Position Sensor "A" Circuit (Bank 1 or Single Sensor)	Either of following conditions is met: (1 trip detection logic) No camshaft position sensor signal to ECM Phase deviation in crankshaft and camshaft position sensor signals	Open or short in camshaft position sensor circuit Camshaft position sensor Camshaft ECM	Comes on	DTC stored
P0344	Camshaft Position Sensor "A" Circuit Intermittent (Bank 1 or Single Sensor)	Wrong pattern of signal from camshaft position sensor is detected (1 trip detection logic)	Open or short in camshaft position sensor circuit Camshaft position sensor Camshaft Valve timing ECM	Comes on	DTC stored

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

P0340

Camshaft Position Sensor "A" Circuit (Bank 1 or Single Sensor)

Either of following conditions is met:

(1 trip detection logic)

No camshaft position sensor signal to ECM
Phase deviation in crankshaft and camshaft position sensor signals

Open or short in camshaft position sensor circuit
Camshaft position sensor
Camshaft
ECM

Comes on

DTC stored

P0344

Camshaft Position Sensor "A" Circuit Intermittent (Bank 1 or Single Sensor)

Wrong pattern of signal from camshaft position sensor is detected

(1 trip detection logic)

Open or short in camshaft position sensor circuit
Camshaft position sensor
Camshaft
Valve timing
ECM

Comes on

DTC stored

DTC Detection Drive Pattern
DTC No.	DTC Detection Drive Pattern
P0340	Engine cranks 4 revolutions or more
P0344	Engine cranks 6 revolutions or more

WIRING DIAGRAM


*a	Camshaft Position Sensor
*b	(Shielded)

CAUTION / NOTICE / HINT

Note

When replacing the ECM, perform ECM Initialization and Registration.

Click here

Tech Tips

When the ECM must be replaced, before replacing the ECM, perform the "Learning Values Save" function using the GTS. Then after installing a new ECM, perform all of the initialization and registration procedures for the "Learning Values Write" function by following the instructions shown on the GTS display.
Read freeze frame data using the GTS. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, and other data from the time the malfunction occurred.

PROCEDURE

INSPECT CAMSHAFT POSITION SENSOR

Inspect the camshaft position sensor.

Click here

Result

Proceed to
OK
NG

GO TO STEP 7 Click here

CHECK HARNESS AND CONNECTOR (CAMSHAFT POSITION SENSOR - ECM)

Disconnect the camshaft position sensor connector.
Disconnect the ECM connector.

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition
B16-1 (G1) - B138-11 (G+)	Always	Below 1 Ω
B16-2 (G-) - B138-10 (G-)	Always	Below 1 Ω
B16-1 (G1) or B138-11 (G+) - Body ground	Always	10 kΩ or higher
B16-2 (G-) or B138-10 (G-) - Body ground	Always	10 kΩ or higher

Result

Proceed to
OK
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR Click here

CHECK SENSOR INSTALLATION (CAMSHAFT POSITION SENSOR)

*a	Normal
*b	Abnormal
*c	Clearance

Check the camshaft position sensor installation.

OK
Sensor is installed correctly.

Result

Proceed to
OK
NG

SECURELY REINSTALL SENSOR Click here

CHECK CAMSHAFT (TIMING ROTOR)

Check the timing rotor of the camshaft.

OK
Camshaft timing rotor does not have any cracks or deformation.

Result

Proceed to
OK
NG

REPLACE CAMSHAFT Click here

ADJUST VALVE TIMING

Adjust the valve timing.

Click here

Result

Proceed to
NEXT

CHECK WHETHER DTC OUTPUT RECURS (DTC P0340 AND/OR P0344)

Connect the GTS to the DLC3.
Turn the ignition switch to ON and turn the GTS on.
Clear the DTCs.

Powertrain > Engine and ECT > Clear DTCs
Start the engine.
Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

Read the DTCs.

Powertrain > Engine and ECT > Trouble Codes

Result

Result	Proceed to
DTC P0340 and/or P0344 is output	A
DTC is not output	B

END

REPLACE CAMSHAFT POSITION SENSOR

Replace the camshaft position sensor.

Click here

Result

Proceed to
NEXT

GO TO STEP 11 Click here

REPLACE CAMSHAFT

Replace the camshaft.

Click here

Result

Proceed to
NEXT

GO TO STEP 11 Click here

SECURELY REINSTALL SENSOR

Securely reinstall the camshaft position sensor.

Click here

Result

Proceed to
NEXT

GO TO STEP 11 Click here

REPAIR OR REPLACE HARNESS OR CONNECTOR

Result

Proceed to
NEXT

CHECK WHETHER DTC OUTPUT RECURS (DTC P0340 AND/OR P0344)

Connect the GTS to the DLC3.
Turn the ignition switch to ON and turn the GTS on.
Clear the DTCs.

Powertrain > Engine and ECT > Clear DTCs
Start the engine.
Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

Read the DTCs.

Powertrain > Engine and ECT > Trouble Codes

Result

Result	Proceed to
DTC P0340 and/or P0344 is output	A
DTC is not output	B

END

REPLACE ECM

Replace the ECM.

Click here

Result

Proceed to
NEXT

CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

Connect the GTS to the DLC3.
Turn the ignition switch to ON and turn the GTS on.
Clear the DTCs.

Powertrain > Engine and ECT > Clear DTCs
Start the engine.
Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

Confirm that the DTC is not output again.

Powertrain > Engine and ECT > Trouble Codes

Result

Proceed to
NEXT

END